// VueCli基于Webpack的项目启动配置项
'use strict'
const path = require('path')
const defaultSettings = require('./src/settings.js') // 头部设置
function resolve(dir) {
    return path.join(__dirname, dir)
}
const name = defaultSettings.title || '后台项目管理' // 设置文件是否存在头部信息

// 查看环境配置是否定义了端口号
const port = process.env.port || process.env.npm_config_port || 9999

// All configuration item explanations can be find in https://cli.vuejs.org/config/
module.exports = {
    publicPath: '/',
    outputDir: 'dist',
    assetsDir: 'static',
    lintOnSave: process.env.NODE_ENV === 'development',
    productionSourceMap: false,
    devServer: {
        port: port,
        open: true,
        overlay: {
            warnings: false,
            errors: true
        },
        // 配置地址反向代理,请在后端接口完善后进行配置,同时在环境文件中修改对应变量,并删除下面mock引入。此处只解决开发环境的跨域代理,线上环境请后端或者运维自行配置
        proxy: {
            // 如果请求中带有/api 将会把地址进行代理改造 例localhost:9527/api/login
            '/dev-api': {
                // target: 'http://ihrm-java.itheima.net/',
                // target: 'http://120.26.98.236:8810/',
                target: 'http://192.168.1.102:8810/',
                changeOrigin: true, // 当前请求是否跨域,由webpacak进行跨域代理
                // 请求路径重写,将本地请求 localhost:9527/dev-api/login 转换为localhost:9527/api/login,也就是将/api进行替换
                pathRewrite: {
                    '^/dev-api': '/api'
                    // '^/dev-api': '/'
                }
            }
        }
        // 引入mock,不需要mock数据请删除
        // before: require('./mock/mock-server.js')
    },
    configureWebpack: {
        // provide the app's title in webpack's name field, so that
        // it can be accessed in index.html to inject the correct title.
        name: name,
        resolve: {
            alias: {
                '@': resolve('src')
            }
        }
    },
    chainWebpack(config) {
        // it can improve the speed of the first screen, it is recommended to turn on preload
        config.plugin('preload').tap(() => [
            {
                rel: 'preload',
                // to ignore runtime.js
                // https://github.com/vuejs/vue-cli/blob/dev/packages/@vue/cli-service/lib/config/app.js#L171
                fileBlacklist: [/\.map$/, /hot-update\.js$/, /runtime\..*\.js$/],
                include: 'initial'
            }
        ])

        // when there are many pages, it will cause too many meaningless requests
        config.plugins.delete('prefetch')

        // set svg-sprite-loader
        config.module.rule('svg').exclude.add(resolve('src/icons')).end()
        config.module
            .rule('icons')
            .test(/\.svg$/)
            .include.add(resolve('src/icons'))
            .end()
            .use('svg-sprite-loader')
            .loader('svg-sprite-loader')
            .options({
                symbolId: 'icon-[name]'
            })
            .end()

        config.when(process.env.NODE_ENV !== 'development', config => {
            config
                .plugin('ScriptExtHtmlWebpackPlugin')
                .after('html')
                .use('script-ext-html-webpack-plugin', [
                    {
                        // `runtime` must same as runtimeChunk name. default is `runtime`
                        inline: /runtime\..*\.js$/
                    }
                ])
                .end()
            config.optimization.splitChunks({
                chunks: 'all',
                cacheGroups: {
                    libs: {
                        name: 'chunk-libs',
                        test: /[\\/]node_modules[\\/]/,
                        priority: 10,
                        chunks: 'initial' // only package third parties that are initially dependent
                    },
                    elementUI: {
                        name: 'chunk-elementUI', // split elementUI into a single package
                        priority: 20, // the weight needs to be larger than libs and app or it will be packaged into libs or app
                        test: /[\\/]node_modules[\\/]_?element-ui(.*)/ // in order to adapt to cnpm
                    },
                    commons: {
                        name: 'chunk-commons',
                        test: resolve('src/components'), // can customize your rules
                        minChunks: 3, //  minimum common number
                        priority: 5,
                        reuseExistingChunk: true
                    }
                }
            })
            // https:// webpack.js.org/configuration/optimization/#optimizationruntimechunk
            config.optimization.runtimeChunk('single')
        })
    }
}
